Process for the production of brushes or a part thereof including the bristles
Abstract
Abstract Brushes or parts thereof including the bristles are produced by injecting plastic material into the cavity of a mold comprising a plurality of segments each having at least one opening therein, the openings forming the cavity. The openings in the segments at opposite ends of the cavity are designed to retain a base section and a head portion respectively of the molded plastic material so that when these two segments are subsequently moved away form each other the connecting plastic material is stretched forming bristle shafts of improved strength with the molecules therein oriented. The head portion is then either severed from the shaft or means is provided for pressing the head portion through the hollow spaced of each of the intermediate segments to remove the brush or part thereof from the mold.
Inventors
- 👤 P Hanggi
- 👤 H Budmiger
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |